What is an Assembly Drawing?

An assembly drawing is needed for all products or inventions that have more than one part. These drawings list all parts and sub-assemblies that make the final product. A BOM (Bill of Materials) on the drawing lists each part number, part name, and part quantity.

Some of these drawings provide instructions on how to assemble the product at a manufacturing level, while others may list part numbers for consumers to re-order parts. Instructions may include information such as how to fasten parts together, or what types of lubricant to use.

The drawing above lists all parts and sub-assemblies in the BOM (Bill of Materials), located bottom right. From there, you can go to each detailed part drawing for any additional information you may need.